【android动态布局】之【ListView动态加载数据模板(使用xml布局)】
转自:http://www.apkbus.com/android-19497-1-1.html
笔者想利用xml布局文件实现一下,因为布局文件在xml文件中实现要规范一些,原理和之前那一篇是一样的,直接来代码
主布局文件other_listview.xml,注意ListView定义id的方式
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <ListView
- android:id="@android:id/list"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- />
- </LinearLayout>
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="horizontal"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:scaleType="fitXY"
- android:src="@drawable/avira_antyvir"/>
- <TextView
- android:id="@+id/tv"
- android:layout_width="fill_parent"
- android:layout_height="20dp"
- android:text="@string/hello"
- />
- </LinearLayout>
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <Button
- android:id="@+id/button"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="更多"
- />
- <LinearLayout
- android:orientation="horizontal"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:gravity="center"
- android:id="@+id/linearlayout">
- <ProgressBar
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"/>
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="正在获取..."/>
- </LinearLayout>
- </LinearLayout>
- package com.focus.loading;
- import android.app.ListActivity;
- import android.os.Bundle;
- import android.os.Handler;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.view.ViewGroup;
- import android.widget.AbsListView;
- import android.widget.AbsListView.OnScrollListener;
- import android.widget.BaseAdapter;
- import android.widget.Button;
- import android.widget.LinearLayout;
- import android.widget.ListView;
- import android.widget.TextView;
- public class OtherListView extends ListActivity implements OnScrollListener {
- ListView list;
- int scrollState;
- int count = 40;
- int lastItem;
- int visibleItemCount;
- Button footerButton;
- LinearLayout footerProgressBarLayout;
- View view;
- ListAdapter listAdapter = new ListAdapter();
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.other_listview);
- LayoutInflater inflater = LayoutInflater.from(this);
- view = inflater.inflate(R.layout.other_listview_footer_more, null);
- footerButton = (Button) view.findViewById(R.id.button);
- footerProgressBarLayout = (LinearLayout) view
- .findViewById(R.id.linearlayout);
- footerProgressBarLayout.setVisibility(View.GONE);
- footerButton.setOnClickListener(new OnClickListener() {
- @Override
- public void onClick(View v) {
- if (lastItem == listAdapter.count
- && scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
- footerButton.setVisibility(View.GONE);
- footerProgressBarLayout.setVisibility(View.VISIBLE);
- if (listAdapter.count <= count) {
- new Handler().postDelayed(new Runnable() {
- @Override
- public void run() {
- listAdapter.count += 10;
- listAdapter.notifyDataSetChanged();
- // list.setSelection(lastItem);
- footerButton.setVisibility(View.VISIBLE);
- footerProgressBarLayout
- .setVisibility(View.GONE);
- }
- }, 2000);
- }
- }
- }
- });
- list = getListView();
- list.addFooterView(view);
- list.setAdapter(listAdapter);
- list.setOnScrollListener(this);
- }
- class ListAdapter extends BaseAdapter {
- int count = 10;
- @Override
- public int getCount() {
- return count;
- }
- @Override
- public Object getItem(int position) {
- return position;
- }
- @Override
- public long getItemId(int position) {
- return position;
- }
- @Override
- public View getView(int position, View convertView, ViewGroup parent) {
- LayoutInflater inflater = LayoutInflater.from(OtherListView.this);
- View view = inflater.inflate(R.layout.other_listview_item, null);
- TextView tv = (TextView) view.findViewById(R.id.tv);
- tv.setText("Hello World " + position);
- return view;
- }
- }
- @Override
- public void onScroll(AbsListView view, int firstVisibleItem,
- int visibleItemCount, int totalItemCount) {
- this.visibleItemCount = visibleItemCount;
- lastItem = firstVisibleItem + visibleItemCount - 1;
- System.out.println(listAdapter.count);
- if (listAdapter.count >= count) {
- list.removeFooterView(view);
- }
- }
- @Override
- public void onScrollStateChanged(AbsListView view, int scrollState) {
- this.scrollState = scrollState;
- }
- }
由于跟之前那篇原理一样的,所以没写注释,不懂的先看前面那篇吧http://www.cnblogs.com/and_he/archive/2011/05/30/2063230.html
效果图